Kinetic study on the photodegradation of Paraquat by TiO(2) nanoparticles immobilized on glass

The photocatalytic degradation of aqueous paraquat solutions with immobilized TiO(2) on the glass illuminated by ultraviolet light (254 nm) was investigated to determine the effect of paraquat initial concentration on the reaction rate. The disappearance of paraquat in the photo degradation process was monitored by UV-Vis spectrophotometer at the 400-200 nm region. The experimental data were used to evaluate the apparent reaction rate constant assuming that paraquat photocatalytic reaction follows a pseudo first order reaction rate.

Keywords:

Photocatalytic degradation , TiO(2) nanoparticles , Herbicide , Paraquat , Kinetic